Control Device Random Disconnection Delay Grid Stability

The patent applies periodic action by implementing a randomized delay period before disconnection. Each electrical system waits for a randomly determined time interval (between minimum and maximum delay values) after detecting the separation condition before actually disconnecting. This transforms the simultaneous disconnection into a distributed, staggered sequence of disconnections, preventing abrupt power fluctuations while maintaining grid stability.

The patent applies parameter changes by dynamically adjusting the delay period parameters (minimum and maximum delay values) based on the type of separation condition detected. For underfrequency conditions, different delay ranges are used compared to overfrequency or other separation conditions. This allows optimization of the disconnection timing to balance system stability requirements with the need to respond within acceptable time frames.

The patent applies preliminary action by implementing a mandatory delay period between detecting the separation condition and executing the disconnection action. This preliminary waiting period with randomized duration prevents systems from reacting immediately to frequency changes, thereby breaking the feedback loop that causes deterministic systems to oscillate between on and off states in response to each other's switching actions.